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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Wednesday, Oct 28
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At a glance
- Condition
- New
- Style
- Metallic
- Color
- Black
- Size
- 5
- Model
- JZ90-54144-05
- Storage
- 0.3 GB
- Dimensions
- 0.91 x 0.91 x 0.28 in
- Warranty
- 1 Year Manufacturer
- Works with
- Smartphone
Features 4
- ACCURACY - SMART SENSING - Oura tracks over 50 health metrics, including sleep, activity, stress, heart health, and womens health metrics. Oura Ring 4 is powered by Smart Sensing, which adapts to you delivering accurate, continuous data, day and night
- LONG LASTING BATTERY - With up to 8 days of battery life, no screens and no vibrations, Oura Ring 4 allows you to focus on the present. From a workout to a night out youre free to forget its on. Until you start getting compliments
- OURA MEMBERSHIP - First month of membership is included with purchase, for new members only. Subscription is 5.99/mo afterwards. Membership is tied to your account via the Oura App, not your physical ring
- HSA/FSA ELIGIBLE - We can accept HSA or FSA funds for the following: Oura Ring, additional chargers, and shipping
Description
Introducing Oura Ring 4: the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most — your health. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn’t just measure your biometrics, it adapts to you, providing insights into over 50 health metrics including sleep, readiness, activity, heart health, stress, metabolic health, and women’s health. Oura Ring quietly and comfortably monitors your health and with 5 to 8 days of battery life — you can forget it’s even on. With multi-ring support, change Oura Ring 4 styles as easily as changing your outfit. If you have two or more Oura Ring 4 styles, you can now switch easily between different finishes in the Oura App.
Specs 44
| Operating System | iOS, Android |
|---|---|
| Memory Storage Capacity | 0.3 GB |
| Special Feature | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Connectivity Technology | Bluetooth |
| Wireless Communication Standard | Bluetooth |
| Battery Cell Composition | Lithium Polymer |
| GPS | GPS Via Smartphone |
| Shape | Round |
| Brand | OURA |
| Model Name | Oura Ring 4 - Black - Size 5 |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| GPS Geotagging Functionality | GPS Via Smartphone |
| Band Material Type | Titanium |
| Case Material Type | Titanium |
| Water Resistance Level | Water Resistant |
| Sport Type | Multi-Sports |
| Human Interface Input | Unknown |
| Clasp Type | Tang Buckle |
| Supported Application | Fitness Tracker |
| Water Resistance Depth | 100 meters |
| Supported Satellite Navigation System | GPS |
| Controller Type | Ring |
| Metrics Measured | Body Temperature, Menstrual Cycle, Sleep Duration, Stress |
| Closure Type | Tang Buckle |
| Battery Cell Type | Lithium Polymer |
| Battery Average Life | 5 days |
| Battery Charge Time | 80 minutes |
| Wireless Compability | Bluetooth |
| Communication Feature | Bluetooth |
| Item Weight | 0.18 kg |
| Item Dimensions | 0.91 x 0.91 x 0.28 inches |
| Item Dimensions D x W x H | 0.28"D x 0.91"W x 0.28"H |
| Target Audience | Unisex Adults |
| Age Range Description | Adult |
| Model Number | JZ90-54144-05 |
| Built-In Media | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
| Wearable Computer Type | Smart Ring |
| Global Trade Identification Number | 34 |
| Manufacturer | Oura |
| Style Name | Metallic |
| Color | Black |
| Band Color | Black |
| Display Type | No Display |
| Warranty Type | Standard/Full |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Pay in 4
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- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Best ring out there, pricey, no real customer support, touchy feely software.
Style: Metallic
Color: Stealth
Size: 11
Really it's a 4.5 stars from me because the software interface is so wordy & cumbersome to navigate. But this brings some science to your sleep. I'm an insomniac--just a night owl in an early bird world, but this ring really helps me improve my sleep. These are great rings. To me rings are superior to bracelets because I work with my hands & power tools so bracelets are out of the question. These are pricey, but good & offer a ton of colors. They offer a ton of sizes. I get it wet, although I take it off to charge when I bathe/shower. I also remove for dishwashing. It can get wet, but eventually that wears them & at the cost, I'm going to keep it as long as I can. I've gotten the stealth twice & love it's matte finish. It can scratch. You can buy thin tape covers if you're worried about that, or take it off for sanding & scrape potential wear. The sensors seem more sensitive from the Gen 3 to Gen 4--less hand falling asleep data during sleep. I switch which hand it's on in my sleep when I roll over most of the time. I started with Motiv ring (bought by Oura,) so I know how good software could be. The Oura software gets annoying--beginning with the subscription. Not cool, only offered monthly, not one time annual fees, uncool. Then there are the updates: they can stop your ring from uploading or syncing at all, so I suggest you stop new software downloads after 2 or 3 upgrades, and back up your data before any download. Why this is critical--I was getting heart surgery & lost ALL my data & neither I nor my doc was able to access it with my last ring, Gen 3. The AI assistant, like most AI these days, is a means for a company of offering ZERO assistance AND not having to pay anyone who might actually help you. The folks answering emails were helpful before the AI. The AI offers a useless loop. I filed tons of questions & complaints & it never escalated to being responded to by a person. Never helpful. Reddit is your only real customer service with Oura. The gen 4 has improvements to the ring: the batteries are NEVER what they claim, 8 days, no way. 5 & change for me. Although this one is lasting longer than my Gen 3 ever did. The sleep data is more sensitive & accurate with this ring. Some of my family calls it the "no duh ring" as in you wake feeling rough, & the ring tells you why--you barely slept. The software interface is a little silly. I don't want any adjectives. I'd just prefer pure data: numbers like REM, Deep Sleep, HR, HRV, RHR, Temp etc.. It's geared toward anxious folks who need cheerleading & advice; I don't want that. If you need that, you'll love this. The entire section on stress is useless to me & mischaracterizes some situations: like happy endorphins for stress; nope! Very few of us can do much about the stress we face, seeing the report is just annoying. Get rid of it. Or let us get rid of it & keep the features we want from that category. And hiding your temp in the readiness section, which is otherwise totally useless...annoying, Woof! I wish we could customize our categories & presentation so I just got #s, and not their numbers--they give you a score for your sleep, activity, HR, & Readiness. Not universal & metrics aren't available so they're as meaningless as their cheers or suggestions. I wish they listed more work outs. And you used to be able to track your heart rate live while exercising. Not anymore. Why not? It's so basic & people loved it. I want to get to a heart rate & hold it over time, increasingly, but don't get that choice now. Lastly if they made their algorithms public to medical institutions, they could be marketed as a tool for sleep studies & HR for cardiology. Either their algorithms are not up to snuff, or they're insecure.
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Reviewed in the United States on July 7, 2026 by a k
Lasted 1 year
Style: Metallic
Color: Silver
Size: 14
Was a comfortable , stylish ring and good health tracker but died after just over a year. Battery life deteriorated to 2 days but reported fully charged after 5-10mins on dock, and now it won't charge at all. Too expensive to replace annually on top of membership fee. I used the AI chatbot on the app, took only a few minutes of simple testing to prove it had failed and they instantly ordered a replacement free-of-charge (with a spare USB dock to boot), which arrived in 4 days. Amazing service!
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Reviewed in the United States on September 16, 2026 by Amazon Customer
Amazing data collection… but a very steep price and short life.
Style: Metallic
Color: Silver
Size: 12
Note: This is a long term review, after owning the ring for 10 months. It disappoints me to have to give this a 1 star review, because when the ring works, it works. It’s very convenient, accurate, un-intrusive to wear, and gives you a ton of valuable data, especially related to your cardiovascular system. But, out of the blue about 10 months into my ownership, battery life has cratered, and even when it doesn’t run fully discharged, it has randomly started disconnecting, meaning it’s not harvesting the data that I expect and want it to, and even worse, without full days of data, it won’t build any trends, meaning the limited data it does collect is useless. Reading online it seems I am not the only person experiencing this disappointment. Oura’s customer service is non existent. I have yet to figure out how to get in contact with a human there. All their customer service is routed through “Finn” their AI assistant. After trying everything that “Finn” has recommended numerous times, and getting nowhere, it would be an understatement to say I am frustrated. One of “Finn’s” suggestions is to fully wipe the ring and app from your phone and reinstall it, and if that doesn’t work, the implication from the system is that it will then elevate it to a customer service rep. The issue with that is when you do that, a hard reset and reinstall, the record with “Finn” also seems to go with it, so the system will never engage a human, it comes across almost like it’s intentional firewall in their service. I am coming up on my 1 year membership renewal. I am at the point where I need to decide if I need to make the $72 annual investment again. I would gladly spend that again, but I’m not really looking at a $72 investment. Given my current ring performance, this means buying another ring. Between the membership and a new ring, with taxes, shipping, etc, etc, etc that’s a near $500 investment; and since it only made it 10 months, that really means it’s effectively closer to $600 a year. Battery powered wearables have a limited life; I went into this understanding that, but, I don’t think that after less than a year of usage, going from ~5 days of battery life and collecting non-stop data to less than 24 hours of life with random crashes is in any way acceptable. Apple or Garmin or Google would have mass recalls or replacements on their hands if their wearables behaved like this. Good health is priceless. The ring helped me tremendously in my fitness journey. I have lost over 65 lbs with its help. At this point, however, given I have hit and am maintaining my weight goal, and from my current experience as well as based on what I read from others online, I refuse to spend any more money with Oura, simply because of their poor customer service and poor product life. My final thoughts: the ring makes your fitness journey significantly easier. Data is king when you’re committed to self improvement. For that, I give it 5 stars; but if you buy one, understand that it most likely will not make it to a year without some sort of collection or battery issue. You have to decide for yourself if $500 for 10-ish months of data is a fair price to pay.
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Reviewed in the United States on September 13, 2025 by Josh A.
Phenomenal Sleep Tracking Tool
I got this Oura ring for my wife for Christmas this past year and she loves it as well as the rose gold color. It's a very good way to take control of your sleep and improve sleep quality. The ring tracks your sleep down to the minute, is crazy accurate, and works with an app that, once installed, works offline and connects to the ring through Bluetooth. Every morning you can get a full breakdown on the app of your sleep pattern for the night including sleep stages (light, REM, deep), heart rate, heart rate variability, body temperature, respiratory rate, total sleep vs time in bed, your sleep efficiency, your "body clock" and even "sleep debt" (which tracks how much sleep you're getting vs how much you need for your body type). It also tracks the menstrual cycle for women, which my wife uses and likes a lot. She's been able to figure out a pattern based on her heart rate that happens the day before her period actually starts, which works every time - super cool! Of course it does other things like tracks your steps, exercise, you can log your meals etc. Too many things for me to include in this review. The ring fits my wife's finger perfectly. Before you buy you have to purchase the ring sizing kit, which is cheap, and you can use it for friends if you refer people (which you can get awarded for monetarily). The sizing is pretty easy, wear one of the sizers for a day and make sure it's comfortable and then order your ring. I've also seen the ring sizing kits on display in places like Costco or Best Buy, so that's another option without having to buy the kit. The battery lasts about a week, which is pretty good. And it charges in less than an hour, sometimes half an hour if she's charging it more regularly than a week (which your supposed to do). My own Oura Ring 4 is over a year old and I have to charge it every 2-3 days. I admit, I did not follow their recommendations for maintaining the best battery life, so can't complain there. Overall, Oura Ring is fantastic and I'd highly recommend it to anyone. My wife and I have both been able to improve our overall sleep quality since using them. They are a very good tool for that if you want to prioritize sleep in relation to health (which anyone should).
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Reviewed in the United States on February 20, 2026 by Keith
Smart Ring for the win!
Style: Metallic
Color: Gold
Size: 8
I’ve been wearing the Oura Ring 4 every day, and what stands out most is how seamlessly it fits into my routine without me having to think about it. It’s comfortable enough that I forget it’s on, and the sleep insights have actually helped me notice patterns I didn’t realize were affecting how I feel the next day. The activity tracking feels more realistic than a smartwatch since it doesn’t nag me, but it still gives me a clear picture of how active I’ve been. Battery life has been solid—I only need to charge it every several days—and the gold finish looks more like a piece of jewelry than a gadget. It’s become one of those things I rely on quietly because it gives me useful info without adding any clutter or hassle.
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Reviewed in the United States on September 18, 2026 by Memphis Tigers
Smart ring useful for tracking some health stats, but many you may already have on your phone.
Style: Metallic
Color: Silver
Size: 11
This version of the Oura works OK, but I probably won't renew my subscription. I purchased this mostly to track my sleep. I'm not a runner or much of an athlete these days, and all of my exercise tracking can be handled by my phone and watch for the most part, but they need to be re-charged daily, so I can't really track my sleep unless I want to carry around multiple chargers. I thought the ring would solve this issue, and for the most part it does. Sleep tracking is accurate for the most part, but since I frequently nap or have my sleep interrupted by life, the ring doesn't always pick up on my catnaps or understand that I went back to sleep later in the night. My main issue with the ring is the comfort. The ring sizer said I was size 11, but the sizer and the ring are not made of the same material, so I would recommend getting a half size larger, if that were possible. The ring is also thicker than many rings so I find it annoying between my fingers. I rarely forget that it's there, and I frequently find myself fiddling with it during the day. Setting up the charger is needlessly finicky in my opinion, since you have to line up the dimple with the light on the charger or nothing happens. Fortunately the LED lights up when you get it right, but it's slightly delayed. This is a minor issue, since you get used to the process soon enough. I really despise proprietary chargers. My other complaint is the lack of notification about the battery level. I think twice I went a couple of days with a ring that had no charge and didn't notice it, so I lost those days' data. Maybe this is a me issue and not an Oura issue, so I may have to look into changing the settings somewhere. This would be a better product with a longer battery life and a thinner band. It does track my sleep well enough, but it seems like a lot to pay for the subscription if that's the only feature I'm using. Another issue is one I had with a smart band I had previously and returned. You have to look at your phone to find out anything, and once you're on your phone you have all the other distractions at hand. If the lights on the inside of the ring could be used for information, this might be a better choice for me.
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Reviewed in the United States on March 6, 2026 by JImw
Surprisingly in love
I love that I was able to find a ring that fits my finger. You’re gonna appreciate its charging capability, appearance, battery, life, step count, sleep, monitoring, and the quality of its app. It has made a huge difference with me keeping up with my steps, but most of all monitoring how well or where I need to improve with my sleep.
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Reviewed in the United States on September 28, 2026 by Damein J Myers
Read this first and Think twice before buying this ring…
I bought this ring mid-February 2025 along with the extended warranty. I just received my second replacement yesterday (end of November 2025). I really wanted to give it a 5 stars, but I cannot. I can’t comprehend why Oura Ring 4 has so many issues. I only use it for sleep and wear it during the day. I do not take a shower with it, nor do I wash dishes with it either. Seriously, I just received my 3rd ring in 9 months. The other 2 are useless (not connecting to the smart phone, not charging) that is why I contacted the help center of Oura Ring. I have to say that Customer Service is Amazing at Oura: they are quick to reply, analyze and provide a replacement after they checked if you are eligible. My 2 replacements rings arrived straight from the Netherlands in about a week later after their shipping date. I bought this ring to track my sleep patterns and heart rate, etc. When the ring works it is great and the app that goes with it is wonderful with clear stats. I just ended up buying another smart device to help me check my sleep patterns, etc. It is one of those things that I was so excited to have this ring until it failed, not just once, but twice. I would not recommend it now that I needed a second replacement. 3rd time might be the charm, I might not know much how long it will work as I plan to compare the results of the new ring and my other smart device by wearing them at the same time for couple nights. After that, the Oura ring will be in its box. I hate to give hard review, but this is my experience and I wanted to let you know about it and let you decide if it is something worth trying or not.
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Reviewed in the United States on November 30, 2025 by Julie